Improvement in dumping dead-plates for furnaces



N. W. PRATT. Dumping Dead-Plate for furnaces.

No. 216,888. Patented lune 24,187.9.

Yr,... -..-m. I

Q 5mi.

f In

N. PETERS. FHOTO-LITHOGRAPHER. WASHINGTON. D C.

UNITED STATn-is PATENT OFFICE.

NATHANIEL PRATT, NEW YORK, N. Y., ASSIGNOR TO GEORGE H. BAB-y OOOK, OF PLAINFIELD, N. J., AND STEPHEN WILOOX, OF BROOKLYN, N.. Y.

IMPROVEMENT IN DUMPINGDEAD-PLATES FOR FURNACES.

Specification forming part of Letters Patent No. 2 l 6,888, dated J une 24, 1879; A application filed July 24, 137e.

To all whom it onu/y cof/wcm:

Be it known that I, NATHANIEL W. PRATT,

of the city, county, and State of New York,`

have invented a certain new and Improved Dumping Dead- Plate for Furnaces, of which the following is a full and exact description.

My invention relates to an improved dumping deadplate. According to my invention, I pivot one end of the dead-plate to the boilerfront by means of hinges or other suitable means, and I support the opposite end in po sition by means of a yoke or support composed of a compound lever so constructed and arranged. that, when desired, by inserting a hand-spike or rod into a socket formed on part of the same the said yoke or support may be folded up and the dead -plate lowered toward the ash-pit, so as to allow of the ashes, elinkers, or the whole of the fire being dumped directly into the ash-pit iu place of being drawn through the re door onto the iloor of the furnace or boiler-room, thereby avoiding all danger of setting fire to the building in which the furnace is placed, and also the nuisance of smoke, arising from the old plan of raking the ashes and clinkers and drawing the fire onto the floor of the furnace-room.

The following is a description of what I consider the best means of carrying out the invention: f

In the accompanying drawings, forming a part of this specification,` Figure l represents a frontview 5 Fig. 2, a vertical section'of part of a furnace with my improvements applied thereto; Figs. 3, 4, and 5 lrepresent detailed views of the same.

In each of the views similar letters of reference are employed to indicate corresponding parts wherever they occur.

A represents the furnace-front; B, the gratebars C, the fire-place D, the ash-pit, and'E my improved dumping dead-plate, which is pivoted at its front end to the furnacefrontA by means of hinges e e, and at its rear end provided with lugs e e', to which is pivoted one end of a link, f, forming part of a yoke or support, F, by means of which the outer end of the dead-plate is supported inor lowered out of position.

a To the lower end of the link f is connected,

` by means of a pin-joint, f', one end of a double lever, f2, forming part of the yoke or support F. The ends f3 f 3 of the double lever f2 are, by means of bolts or pins f4, connected to lugs or projections a, formed on or affixed to the furnace-front A. On the under side of the center portion of the double lever f 2, I form a socket, f 5,' adapted to receive one end of a suitably-formed lever or bar, G, for the purlposeof folding or moving the parts of the yoke or supportF when desired, so as to raise the dead plate E into the position shown in full lines by Fig. 2, or to lower it into the position shown by dotted lines in the same figure, in which latter position the reman is enabled to rake the ashes or clinkers from the re into the ash-pit, or to draw the entire fire directly in to the ash-pi t, without the necessity of any part of the ashes, clinkers, or lire coming or being drawn onto the floor of the furnaceroom.

. When the fireman requires to rake or draw the re, he opens the door of the ash-pit (not shown) and inserts the bar G into the socket f5, and lowers the dead-plate into the position shown by dotted lines in Fig. 2. He then reA movesthe lever G, closes the door of the ashpit, and opens the fire-door. He is then able to draw any ashes, cinders, or the 4whole of the fire over the front end of the furnacebars B, and drop or dump the same into the ash pit D, where the same can remain until cold, if desired, or properly wetted down, thereby avoiding the great discomfort of raking or drawing the fire under the old plan. When the fireman has finished raking or drawing the fire, he immediately closes the redoor, inserts the lever G into the socket f 5, and raises the yoke or support F and the dead plate E into the position shown by full lines in Fig. 2, until it is again required to rake or clump the fire.

f is a lug formed on the under side of the link f, and f7 is a similar lug formed v`on the double lever f2. These lugs are so formed that when their faces f8 come together, when the yoke or support F is thrown up into the position shown by Fig. 2, the joint f is thrown past its center, and the downward thrust of the dead-plate E is borne directly by the lugs f6 f7, thereby firmly holding the dead plate in position until the yoke or support is nnfolded by means of the lever G.

Modications may be made in the details within wide limits by any competent mechanic. For instance, I can employ any other suitable form of hin ge in place of those shown, or the lever for workingthe dead-plate may be inserted in a socket cast in any suitable part of the yoke or toggle F that will not necessitate the opening of the ash-pit door to work it, or the lever G may form a part of the same casting.

I am aware that toggles have been before used to support the drop doors or plates of cupola-furnaces. I do not claim such support broadly; but

I claim` as my inventionl. The combination, with the furnace-frame and dead-plate E, hinged to said frame, of the togglesff2, hinged to the dead-plate and frame at e and f4, respectively, and secured to each other by a pivot or hinge at f1, substantially as described.

2. The combination, with the frame A and the dumping dead-plate E, hinged thereto, of the toggles f f2, hinged respectively to the dead-plate and frame, and connected together by ahinged joint, the said toggles being provided with abutting pieces or shoulders f6 f7, substantially as described.

3. The combination, with the frame A, the dum ping dead-pl ate E, hinged thereto, and the toggle j', hinged to the dead-plate at e', of the toggle f2, hinged to the toggle f1, and provided With branched or forked arms hinged to the frame A at f4, and provided also with a socket, f5, at a point between said arms, substantially as described.

In testimony whereof I have hereunto set my hand this 22d day of J uly, 1878, in the presence of two subscribing Witnesses.

W. GoLBoRNE BRooKEs, CHAs. D. MOLLER. 

